Selecting The Sync Moment - Leica R9 Bedienungsanleitung

Flash on the first shutter curtain

Selecting the sync moment

Flash photographs are illuminated by two light
sources, the available light and the light from the
flash. Parts of the subject that are exclusively or
primarily illuminated by the flash are almost
always reproduced extremely sharply (with cor-
rect focusing) due to the extremely fast pulse of
light. By contrast, all other parts of the subject –
those that are sufficiently illuminated by the
available light or illuminate themselves – are por-
trayed with different degrees of sharpness in the
same picture.
Flash on the second shutter curtain
Whether these parts of the subject are repro-
duced sharply or "blurred", and the degree of
blurring, is determined by two independent fac-
tors.
1. The length of the exposure time, i.e. for how
long these parts of the subject "act upon" the
film
2. How quickly these parts of the subject – or the
camera itself – are moving during exposure.
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